This auction is:3 Pieces Grit 50 3" (10mm Thick) Floor Pad . This package carries:3 Pieces of 3" (10mm Thickness) Diamond Polishing Pad for granite marble concrete terrazzo. They are:3 Pieces X Grit 50. Description of the 10mm Thick Floor Pad: -Much aggressive to do mirror effect, -Velcro backed, can be attached to the floor polishing machines, -Used dry or wet. -designed for floor machines to polish ,restore and maintain the concrete floor, terrazzo floor and granite floor.